<template>
  <div class="login">
    <el-form ref="loginRef" :model="loginForm" :rules="loginRules" class="login-form" v-if="!QRcodeSwitch">
      <!-- <h3 class="title">项目毕设管理系统</h3> -->
      <h3 class="title">{{ title }}</h3>
      <el-form-item prop="username">
        <el-input v-model="loginForm.username" type="text" size="large" auto-complete="off" placeholder="账号">
          <template #prefix><svg-icon icon-class="user" class="el-input__icon input-icon" /></template>
        </el-input>
      </el-form-item>
      <el-form-item prop="password">
        <el-input v-model="loginForm.password" type="password" size="large" auto-complete="off" placeholder="密码" @keyup.enter="handleLogin">
          <template #prefix><svg-icon icon-class="password" class="el-input__icon input-icon" /></template>
        </el-input>
      </el-form-item>
      <el-form-item prop="code" v-if="captchaEnabled">
        <el-input v-model="loginForm.code" size="large" auto-complete="off" placeholder="验证码" style="width: 63%" @keyup.enter="handleLogin">
          <template #prefix><svg-icon icon-class="validCode" class="el-input__icon input-icon" /></template>
        </el-input>
        <div class="login-code">
          <img :src="codeUrl" @click="getCode" class="login-code-img" />
        </div>
      </el-form-item>
      <el-checkbox v-model="loginForm.rememberMe" style="margin: 0px 0px 25px 0px">记住密码</el-checkbox>
      <el-button style="margin: 0px 0px 6px 15px" size="small" @click="toQrLogin">二维码登录</el-button>
      <el-form-item style="width: 100%">
        <el-button :loading="loading" size="large" type="primary" style="width: 100%" @click.prevent="handleLogin">
          <span v-if="!loading">登 录</span>
          <span v-else>登 录 中...</span>
        </el-button>
        <div style="float: right" v-if="register">
          <router-link class="link-type" :to="'/register'">立即注册</router-link>
        </div>
      </el-form-item>
    </el-form>
    <el-form class="login-form" v-if="QRcodeSwitch">
      <el-button @click="QRcodeSwitch = !QRcodeSwitch" size="small">返回</el-button>
      <h3 class="title">二维码登录</h3>
      <div class="demo-image__placeholder">
        <div class="block">
          <el-image :src="QRcodeSrc" />
        </div>
      </div>
    </el-form>
    <!--  底部  -->
    <div class="el-login-footer">
      <span>Copyright © kindear</span>
    </div>
  </div>
</template>

<script setup name="Login">
import { getCodeImg, getQrCode, checkQrCode } from "@/api/login";
import Cookies from "js-cookie";

import { encrypt, decrypt } from "@/utils/jsencrypt";
import useUserStore from "@/store/modules/user";
import { setToken } from "@/utils/auth";
import { inject } from "vue";
const title = inject('title')
const userStore = useUserStore();
const router = useRouter();
const { proxy } = getCurrentInstance();
const QRcodeSrc = ref("");
const QRTimer = ref(null);
const loginForm = ref({
  username: "",
  password: "",
  rememberMe: false,
  code: "",
  uuid: "",
});

const loginRules = {
  username: [{ required: true, trigger: "blur", message: "请输入您的账号" }],
  password: [{ required: true, trigger: "blur", message: "请输入您的密码" }],
  code: [{ required: true, trigger: "change", message: "请输入验证码" }],
};

const QRcodeSwitch = ref(false);
const codeUrl = ref("");
const loading = ref(false);
// 验证码开关
const captchaEnabled = ref(true);
// 注册开关
const register = ref(false);
const redirect = ref(undefined);

function handleLogin() {
  proxy.$refs.loginRef.validate((valid) => {
    if (valid) {
      loading.value = true;
      // 勾选了需要记住密码设置在 cookie 中设置记住用户名和密码
      if (loginForm.value.rememberMe) {
        Cookies.set("username", loginForm.value.username, { expires: 30 });
        Cookies.set("password", encrypt(loginForm.value.password), {
          expires: 30,
        });
        Cookies.set("rememberMe", loginForm.value.rememberMe, { expires: 30 });
      } else {
        // 否则移除
        Cookies.remove("username");
        Cookies.remove("password");
        Cookies.remove("rememberMe");
      }
      // 调用action的登录方法
      userStore
        .login(loginForm.value)
        .then(() => {
          console.log("跳转首页");
          router.push({ path: redirect.value || "/index" });
        })
        .catch(() => {
          loading.value = false;
          // 重新获取验证码
          if (captchaEnabled.value) {
            getCode();
          }
        });
    }
  });
}

function toQrLogin() {
  QRcodeSwitch.value = !QRcodeSwitch.value;
  getQrCode().then((res) => {
    console.log(res);
    QRcodeSrc.value = res.img;
    let uuid = res.uuid;
    QRTimer.value = setInterval(function () {
      checkQrCode({
        uuid,
      }).then((ans) => {
        console.log(ans);
        if (ans == null) {
        } else {
          clearInterval(QRTimer.value);
          setToken(ans.token);
          router.push({ path: redirect.value || "/" });
        }
      });
    }, 2000);
  });
}

function getCode() {
  getCodeImg().then((res) => {
    captchaEnabled.value = res.captchaEnabled === undefined ? true : res.captchaEnabled;
    if (captchaEnabled.value) {
      codeUrl.value = res.img;
      loginForm.value.uuid = res.uuid;
    }
  });
}

function getCookie() {
  const username = Cookies.get("username");
  const password = Cookies.get("password");
  const rememberMe = Cookies.get("rememberMe");
  loginForm.value = {
    username: username === undefined ? loginForm.value.username : username,
    password: password === undefined ? loginForm.value.password : decrypt(password),
    rememberMe: rememberMe === undefined ? false : Boolean(rememberMe),
  };
}

getCode();
getCookie();
</script>

<style lang="scss" scoped>
.login {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  background-image: url("@/assets/images/login-background.jpg");
  background-size: cover;
}
.title {
  margin: 0px auto 30px auto;
  text-align: center;
  color: #707070;
}

.login-form {
  border-radius: 6px;
  background: #ffffff;
  width: 400px;
  padding: 25px 25px 5px 25px;
  .el-input {
    height: 40px;
    input {
      height: 40px;
    }
  }
  .input-icon {
    height: 39px;
    width: 14px;
    margin-left: 0px;
  }
}
.login-tip {
  font-size: 13px;
  text-align: center;
  color: #bfbfbf;
}
.login-code {
  width: 33%;
  height: 40px;
  float: right;
  img {
    cursor: pointer;
    vertical-align: middle;
  }
}
.el-login-footer {
  height: 40px;
  line-height: 40px;
  position: fixed;
  bottom: 0;
  width: 100%;
  text-align: center;
  color: #fff;
  font-family: Arial;
  font-size: 12px;
  letter-spacing: 1px;
}
.login-code-img {
  height: 40px;
  padding-left: 12px;
}
.demo-image__placeholder .block {
  padding: 5px 0;
  text-align: center;
  width: 100%;
  box-sizing: border-box;
  vertical-align: top;
}
</style>
